Heater plug



March 12, 1929. E, CLEMENCE 1,704,726

HEATER PLUG Filed Aug.l2, 1926 INVENTOR llz'oi 76111612013 MMD-QM,

Patented Mar. 12, 1929.

arene* ELLIOTT CLEMQTCE, OF NEW YORK, N. Y., ASSGNR T0 lV'L'G'Y/ATT COREORATION, GF NEW YORK, N. Y., A CGRPOlATDlJ 0F ISE?? YORK.

HEATER PLUG.

Application filed August 12, 192, Serial No. 128,814.

This invention has reference to an electric connector, known as an armored heater conhector; and which device generally, is in the torni of two moulded complements or" insulating material, brought together with socln ets at the meeting portions, enclosing terminais, and which complements are usually se cured together by one more bolts passi-nge; therethrough.

The object ofther present invention is to provide a protective armor and locking or securing means at the outer end of the moulded complements, which not only assist in holding the same together, but will also prevent the splitting or breakage thereof.

A further object of the invention is to provide an end enclosing housing for this purpose, arranged to retain and position the bolt nut and conceal the sain-e, and which will 'further provide a countersu-nk mounting Yl'or the bolt or screw head, thereby providing a substantially flush and smooth end closure.

A further object of this invention is to provide means on the complementary mouldv ed pieces, whereby, when the metal armor piece is slidalily mounted thereon, the armor p'ece will automatically cause the two coinpleinents to be forced together in a rigid manner, thereby causing the armor and the molded elements to he held together in rigid assembly.

In the accompanying drawing showing` one embodiment of my invention,

Figure 1 is a front elevation of the assembly,

Figure 2 is a longitudinal section,

Figurev 3 is onev ot the moulded complements with armor removed,

Figure l is a side View of one moulded complement or element,

Figure 5 shows the elements assembled bcfore application of the armor from the reverse side.

Figure 6 is partial section enlarged ot one element and the armor in the act ot" slid ing on to operative position.

Figure 7 shows an end view of the armor.

Devices of this character are usually coinposed of a pair ot' substantially duplicate complements ot nioldahle dielectric composisuch as 7 and 8, which have recessed po tions on their meeting faces to contain suitable electrical contacting and terminal nenihers, not herein shown. One end such as 9 is generally enlarged for receiving wire connecting terminals, and a supportin coil spring, not shown hut well known in thls art. these inoulfiled complements are usually held together hy a. ci: bolts such as 10 and 12.l passing throu h snit sly located holes B iii the complcn i. Y holt is usuallyv placed adjacent the outer end thc-root. i

ll'vhere these holle alone are employed without reinforcement, rough handling, dropping, etc.. in addfion to the strain ot holt tension tends to iinicture or break the insulation, and become dangerous to use. To overcome this ditiicilty l provide a locking and reinforcing armor member, in the forni ot an il, headed :terrule 18 ot' suitable ine-tal, i, ith the end portions slightly headed or rounded as et i4. The two complements have their armor ends 15. 15, slightly reduced and the armor piece or ierrule 13, is made to have a snug` tit on the contacting complements :it these portions 15, as indicated in Figs. 1 and 2, and its outer face is preferably flush with the unarmored portion, generally denoted hy A, oi the complements beyond the armor. This is fully illustrated at Fig. 6.

To assist in causing a compression tit of the armor Ylieruule when slid upon the co1nplements, I provide one or more suitably tapering ribs 16', 16, two on each armor tace of each complement, as indicated in Figs. 3-5. These ribs are preferably made to converge outwardly, so that they will have wedge and shearing action on the ferrule as it is forced on to the complements, as indicated in Fig. 6.

The edge ot the terrule as it slides on, mayv have a kind of shearing action and will sonic4 what reduce the we-:lge or rib, insuring a tight compressi-on tit between the terrule and the complements.

The ferrule is provided with an inner cutting edge for shearing the ribs, the pointed end of the ribs shearing most easily, the wide end of the rib offering more resistance to shearing and forcing the cutting edge away 'from the side tace of the reduced ends, whereby the cutting edge shears oli' the rih to a tight wedging tit irrespective of unavoidable variations in the size ot the reduced ends and ribs during manufacture.

rlhis ferrule is rranged to surround and enclose the holt 12 at this end portion. ln one the complements such as 8, a recessed socket l? is provided at the opening B for the bolt, preferably of the same contour as llO `ferrule. f

The other complement 7, at the bore B tor the bolt 12 is recessed in the form of an elongated open-sided slot 19, see Figs. 3 and 1" iis is to receive the projecting margin et the counterl'mre :2O in the tei-rule 13, as indicated in F ig. 6, and which recess 19 adjacent the bore B Will accommodate and receive the counterbored head 21 oi the bolt. Since the counterbore 20 projects inwardly, the slot 19 will permit the errule to be advanced until this opening is opposite the bolt hole; the nut 18 having been previously placed in the socket, the ferrule is slid on until it is flush at the shouldered end of the complements. Then the bolt 12 is inserted in the counterbore 20, and is screwed into the nut held in its socket by the ferrule. The bolt is ot such length that the head Will engage the counterbore 20 and press this part of the ferrule against the complement 7.

It Will beobserved that the ribs 16 are on opposite sides of the bolt .for each complement, and Will insure a tight fit of the ferrule. At the same time the bolt will draW one face of the ferrule into very tight engagement with the complement on this side.

The assembling of this deviceis very simple and will be understood by the description given. The bolt can be removed at any time, and then the errule slid ogiving access to the terminals, and the several parts returned to locked position.

While 1 have not shown the usual interior electric Acontacts and terminal connections herein it is understood thatfthey are of any suitable standard type adapted for this purose. p It is further obvious that an end armoring of similar form maybe used by modifying the construction herein, Without departing from the scope of the herein appended claims.

Having described my invention, what l claim is: v

1. A heater plug of the class Idescribed, comprising tvvo molded insulating complements, said complements having reduced ends and' bolt vreceiving mea-ns therein, lockingY bolts in'said receiving means and a ferrule adapted tofit over said reduced ends and one Yof said bolts, shearable rib means between said errule-and said complementsfor causing the errule and t-he bolt associated there- With to compress said complements together.

2. In an insulated heater plug of the class described, the combination of dielectric, suhstantially duplicate ribbed complements, a metal armoring errule for compressively holding said complements together at one end thereof, bolt holding means for said complements, a nut socket seat on-one of said complements, a counterbore-slot in the other of said complements and a errule having a counterbored belt hole therein, said ferrule having a cutting edge thereon for shearing said ribs When the ferrule is slid upon said complements to hold the sam-e in operative assembly.

3. An insulated heater plug et the class described, comprising a pair oi? substantially duplicate ribbed con'iplenients, a counterbored boit receiving errule for compressively holding said complements together at one end thereof, bolt holding means for said complements, a nut socket seat on one oi' said complements and a counterbore fel-rule receiving slot in the other of said complements and a errule having a counterbored bolt hole therein, said ferrule having a cutting edge thereon for shearing said ribs when the ferrule is slid upon said complements to hold the samein operative assembly, and a bolt passing through said complements and said terrule to lock the complements together.

4. A plug comprising a pair of complements; means including a pair of members holding said complement-s together; and a device held on an end of said plug by one of said members and hiding and holding in place the other member.

5. A plug comprising a pair of complements; means includingv a pair of members holding said complements together; and a errule held on an end of said plug by one of said members and hiding and holding in place the other' member.

6. A plug comprising a pair of complements; means including a nut member and a bolt member holding said vcomplements together; and-a ferrule held on an end of said plug by one of said members and hiding and holding in place the other member.

7. A plug comprising a pair of complements; said plug having a bolt hole provided With a nut-receiving end-socket and passing through the complements; a errule on said end having a bore; a nut in said nut-'receiving socket covered by said errule; and a bolt in said hole and bore and having its threaded end in said nut.

8. A plug of elongated transverse section comprising a pair of chambered complements having reduced ends and Wide meeting faces extending to the side and end edge faces of the plug; said plug having transverse outer and inner bolt holes provided With nut-receiving and head-receiving end-sockets and intersecting said aces,passing through the intramarginal part of the plug, the outer hole passing through the reduced ends; a ferrule on said ends having a counterbore; a nut in said nut socket of the outer hole covered over, hidden and held against removal by said ferrule; a bolt in said outer hole having its head received in said counter-bore and its threaded end in said nut and terminating short of the ferrule; and a clamping bolt received in said inner hole, the nut being held against removal in any direction by the conipleinent and terrule while the holt is removed entirely away from the pluA 9. A plug comprising a pair ot complements; Said plugY having' a holt hole through the ends` ofl the conxpleiment-=` one oi' said ende heing provided with a reneeeed passage in it` outer fave extending` from the adjacent end of the complement to said hole; a lei-rule on said end having a bore provided with a rouw ter bore having an inward projeotion adapted to pass through Said paseago into alineinont with the holo; and a Clan'ipinf;l holt in mid hole and bore.

10. A plug comprisingr a pair of Compleinents; said plug having a bolt hole provided with a head-receiving end-socket and passing through the ends of the complements onel of Said ends having a passage recess extending Y"roin the end tace of the Complement to the head-receiving end-Socket of said end; a Y'errule on Said reduced ends; Said ferrule having' an inwardly proieotingy counter hoi-o adapted to pass through said passage recess into the head receiving socket as the fel-ruley is applied and to register with Said hole; a holt in Said hole and bore: and a nut on the thremled end ot' said holt.

Signed at New York in the County of New York and State of New York thiQ 2G day of July` A. D. 1926.

ELLIOTT CLEMENCE 

